Fig. 5

Relationship between mean values of a N% and clay%, b SOC% and clay%, c C/N and clay%, d SOC% and N%, e SOC% and P (ppm), f P (ppm) and clay %, g P (ppm) and pH, h P (ppm) and C/N, and I N% and C/P (meq/100 g). N  nitrogen concentration, TOC  total organic carbon concentration, P  phosphorus concentration, C/N carbon/nitrogen ratio, CEC cation exchange capacity, CNb coast forests dominated by N. betuloides, CNp coast forests dominated by N. pumilio, CM coast mixed forests with similar proportion of N. pumilio and N. betuloides, MNb mountain forests dominated by N. betuloides, MNp mountain mixed forests dominated by N. pumilio, MM mountain mixed forests with similar proportion of N. pumilio and N. betuloides. Bars Standard error